Lock parts and method of forming them



April l2, 1938. 1 A. 1 scHuYLER LOCK PARTSVAND METHOD OF` FORMING THEMFiled June 14, 1935 2 sheets-sheet 2y 4/ 6 254/ 54/ 2Q 254,24 Z22 3 2)223 2 23 24' Z4 s 'L L5 f VvE/'wolf1 A. L Schw/ER r' @R31 w AraR/vfr 1 vlPatented Apr. `12, Y

PATENT OFFICE f "LOCK raars -METHOD oFfroRmNG "Andrew L. Schuyler, LaGrange, lll., assignor to Westem` ,ElectricV fCompany,` Incorporated,New I Y York, N. Y., a'corporation oLNewxYork yApplicationJam? 14, 1935,serial No. .26,599

,solaimsq(Craze-14st v non equipment, centempiatesja loci; boitier .arotor center4 tumbler type lock.forn'iefi` fromsheet 3 `rifietalstocl:by blanlring, perforating andvbending lthej lower half of.theboltyand'attaching a hat 'plate thereto at the latch` portion, thenreducing@14" the thickness oftheiatch portion of the bon by swaging it `totheproper thickness and riveting afsubstantially U-sh'apedupper half of alock y bolt, which hasbe'en formed by aserles of punch,-y

` n" ajpn'ch press, to theiwer hair or the lock` boit` assembly. I ,Inaccordance with another embodiment, the upperhalf fof a lock `boltassembly is formedv .byv

2B of "tlat metal stock, simultaneously shearing Vvand bending a portionofthe' blank,n forming a second bend inthe blankandattaching the partjust def;

scribed to la blank of e. predetermined `shape by ".to "apredetermined.dimension vin .thicknessand shaving thefedgespf thevjoined-parts toa predeterminedcontour.v y, l l f 1.-.*-

"O'ther featuresand advantages'of `the inven-k wtion will becomeapparent fromgthe following deltailed description when considered inconjunction with they accompanying drawings, wherein Figs.` 1 to 4 areplan-views of the lowerportion of the lock boltassembly'in "the variousI stages of its manufacture;- f

and 3;" l n 4 Figs.` '1, 8, 9 and 10 are afplanview, 'a sidevew';

a plan view and an .end elevationaly view, re-

ture; A .I

"150 `lower half, offthe lock bolty assemblyV after they they areassembled;

f Fig. 13 is an en yinFig. 12; f

' shown in'Figs". 14 to 17, inclusive, is used;

i ing, 'shaving,.be`nding andslotting operations ,onty

perforating and ustampilng'a blank; from a s heet n welding ittheretofthenjswagwing the joined parts Figs.y5 and 6 are endviews of theupper half ,of` the lock bolt assemblyas shown in` Figs'. `2

spenvely, .of the uppehalf .of the Jock fbolu' assembly inthe various-stages of its manufac- Figs. 11 and 12 are plan viewsof the upper and:

have been assembledillustrating/the two stagesv of! manufacture'`through "which" they` pass" after d veyypf the structure shown fothertype of upper half of a. lock bolt assembly;

I Fig. A18 is a plan view of the lower half of a lock bolt assembly withwhich the upper half y Figs'.` 19, 20 and 21` are planviews of the as- 6`sembled` upper and lower parts of the lo'ck `bolt assembly during thevarioussteps in its manufacture, and

Fig'. 22`is a plan View. of a lock with the cover 10 K plate'removedandillustrating the 4type of p ylock v `bolt assembly. shown in Figs. 19 to21, in posi- `tion in a lock. I

In the embodiment of the invention disclosed in Figs.` l tof13, a lockbolt `assembly is .formed 15 by stamping 'ablank` I (Fig. 1) `from astrip of sheet metal stock wherein the blank I has a slot Zandapertures-,3 and! formed therein in the stamping operation. L Aprojecting portion` is also formed fas apart of the blank Iin this`stamping operation. y; 20

The blank I is then subjected to anotherpunchf" ingoperation in which,operation the projecting; portion y5 is'`b e`nt"upwardlywas shownin-Fig. 2- toprovide a strengthening rib when the bolt is f assembledinalock. p l *I 25 In the' next succeeding operation, a fiat metal stript'is secured to the lower or forward end.

of the blank llbyfw'eldingit at points 1 as shown..

on the` bolt of a.,v predetermined thickness.

`After the strip` I` is secured to ytheblank I l as shownlinFig. 3thelower or forwardy end of the bolt is subjected yltyrnfessureto-swage-thatv portion thereof to the desired thickness.` `ThisWillresult irrforcing somey of thev metal lof` lthe blank I and thestrip I out of its former shape. as indicated by the rough edges at 8(Fig. 4). The assembled'strip 6 and blank I are then ready'to` beassembledwith the upperhalf of the bolt 540 assembly. 1 n

,Theupperhalf of the bolt asrsemblyisi'ormed` by stamping a blank 9havingthe contour shown in f7 `from sheetmetal stock. This blank 9 isthenstood on edge and shaved to form abev-45 elededgeat I0 and aV-shaped groove at Il (Fig. 8). f After having the beveled edge andV-shapedgroove formed in the blank 9, theblank isagain laid fiat landslottedin a punch :pressr as shown atv I2 (Fig. 9`) After thisslottingoper-'- 50 ati-on, the blank Il is subjected to anotherpunchpress operation Awhich forms it to a substantially Ur-shapedcontour as`shown in Fig. 10 wherein` the. sides are formed. ,These sides willinthe" `finished lock shown in Fig. 22,coopera.te with in Fig. 16 alongthe line 2|.

the code notches M formed in operation of the lock.

It.will be noted that the tumblers upon in Figs. 7, 9 and 10 the blank lhas a pair of upwardly extending lugs I3. These lugs are insertd in theapertures 3 and 4 in the blank I and serve as rivets to hold the formedblank 2 which constitutes the upper half of the bolt .assembly in placeon the lower half of the bolt assembly.

After the parts are in Fig. 11, thefedges of the latching portionv ofthe bolt which ismade up of strip 8 and forward or lower end ofthe blankI are shaved at I5 to the desired contour, thereby removing the roughedges shown at l (Fiss. 4'and 11). The final bolt assembly comprisingthe upper half formed from the blank l and the lower half formed fromthe blank I and strip 8 will then be as shown in Figs. 12 and,13. Inthis condition the bolt assembly is Fig. 22 in a lock of the samegeneral type but not the exact construction of the lock shown in thepatent to O. A. Shann, 1,793,254, patenteddFebruary 17, 1931.

In another embodiment of the invention a similar type of lock boltassembly is provided. 'I'his latter type of lock bolt is formed in amanner similar to that described hereinbeforeV except that beingsomewhat simpler in construction there are fewer operations required inthe manufacture of it. Figs. 14 to 21 illustrate the steps in themanufacture of this type of lock bolt..

In accordance with this embodiment of the invention, a blank of thelatching portion and lug of the bolt. After the blankZIl has beenstamped from stock it is sheared along the line 22 and bent along theline 2l as shown in Fig. 15 After the blank has been stamped as shown inFig. 14 and bent as shown in Fig. 15, it is again subjected to a bendingoperation to bend a portion of it forwardly as shown After the bendingoperations have b'een performed, the blank is set flat in a xture andshaved to form a V-shaped' 17) in the portion. lthereof which was bentdownwardly at 23 as groove as shown at 25 (Fig.

shown in Fig. 20 and then twisted forwardly by bending along the lineA24 as shown in Fig. 16. The blank 2l which has been formed to the shapeshown in Fig. 17, constitutes the upper .half of this type of lock boltassembly and also provides the barrel 32 `as shown in a thickening orfiller tion of the bolt.

j -The lower portion stamping a blank 28 the contour shown in Fig. 18,wherein there is a guide slot 40 and a rounded cut out portion I1 .forcooperation with an actuating lever on of a lock (Fig. 22). The blank20, Fig. 17, is secured to the blank 28 by spot welding it thereto atthe-points 21 whereupongthe assembled upper and lower halves of theassembly arev subjected to pressure at the latching portion. Thisoperation will reduce the of the bolt is formed by kthickness of thelatching portion by swaging the surplus rmetal downwardly and to thesides as shown in Fig. 20 to reduce the thickness of the Y latchingportion to the desired dimension (see 111g. 20). After the upper andlower halves of the` assembly have been joined together as dethusassembled as shown` which thelOck bolt ready to be assembled as showniny punching a'blank from sheet plate for the latching por from sheetmetal stock to' wherein the lock bolt, l assembly designated gen-lerallyin Fig. 22 by the-numeral 3| is assembled with a lock center orbarrel 32. movable tumblers I3, and fixed tumbler 34 in a housing Il.The lock shown in Fig. 2 2 with the top plate removed is a known type.of rotor center tumbler type lock as shown by Patent No. 1,793,254 inassembly II acts in the-same manner as heretofore and is of the samegeneral contour as those heretofore used, the distinction being that thebolt is formed entirely by punch press operations from sheet metal stockand is therefore much cheaper to manufacture than those heretoforeknown.

What is claimed is:` l Y 1. Ina lock, a'bolt assembly comprising a latchportion formed of two sheet metal strips welded together and swaged tothe desired thickness, a base portion comprising a prolongation of oneof said sheet metal strips formed to Aslide in the lock and to cooperatewith an actuating lever in the lock, and an upper portion formed of asingle piece of sheet metal bent to form a' lug or stud for cooperationwith the tumblers of the lock. 2. A method of forming bolts for rotorcenter tumbler type locks Vwhich includes punching a blank from sheetmetal stock to va predetermined configuration to form 'a part of a latchportion, a lever cooperating portion and a guide portion, punchingablank from sheetmetal stock for use as an upper bolt portion, bendingthe, second mentioned blank to a shape so that apportion thereof willcooperate with codenotches'in the tumblers of a lock, and' securing itto said ilrst blank.

3. A method of forming boltsfor rotor center tumbler type locks whichincludes punching a blank from sheet metal stock to a predeterminedconfiguration to form a part of a latch' portion, a levercooperatingportion anda guidetportion, ,metal 101 Se as an upper boltportion, bending'the second me`n`` honed blank to a `shape so that aportion thereof' will cooperate with code notches in the tumblers of alock, shaving'- a V-shaped safetynot'ch in a portion of said bent blank,welding a thickening plate to the first formed-blank, swaging the joinedfirst mentioned blank andthickening plate to the ldesired thicknesstofornra latch portion, and

shaving the latch portion to the desired contour. 4. A method offorming-bolts for rotor center tumbler type locks-which includespunching a punching a blank from sheet metal stock for use as an upperboltportion, bending the second mentioned blank to a shape .so that aportion' thereof will cooperate with code notches inthe tumblers of alock, shaving a V-shaped safetyl notch in a portion of said bent blank,welding a thickening plate which may constitute part of the bent blankto the ilrst formed blank, swaging the Joined first mentioned blank andthickening plate to the desired thickness toV form a latch portion, andshaving the latch portion to the desired contour.

5. In a lock, a bolt assembly comprising a latch portion formed of twosheet metal strips welded together and swaged to the desired thickness.a `base portion comprising a prolongation of one of said sheet metalstrips formed to slider in the iockand to cooperate withan actuatinglever in the lock, and an upper portion formed of a single piece ofsheet metal bent to form a lug or stud 1i for cooperation with thetumblers and having a i V-shaped groove ,shaved therein'or cooperation"with corresponding safety grooves in the tumblers of the lock.

Y *6. In a lock, a. bolt comprising a base plate ',formed from a singlesheet of metal and `having a guide slot formed therein, aportion adaptedto cooperate with the actuating lever of the lock and an extendingportion to provide a part of the ,A latching portion of the lock, athickening plate 'attached to the base at the latching portion thereof,said thickening plate and base being swaged to the desired thickness andshaved to the desired contour, an upper portion adapted to cooperatewith the tumblers of thelock comprising a sheet metal blank punched to apredetermined contour n and having its edges shaved to form a bevel on 1tumblers of the lock and beingvxed to the base plate by riveting.

tumbler type locks comprising" punching a blank from sheet metal andconcurrently perforatlng `an aperture therein, shearing and bending a.portion of the blank down to the aperture yto one edge and a V-'shapedgroove inthe othery edge,` the upper portion being bent to cooperatewith the safety notches and code lnotches on the y 7. lA method offormingtboltsffor rotor center g bend a portion of the blank at rightangles to the remainder of the blank, forming a right angle bend in theblank at right angles to the bend previously formed therein, shaving a v-shaped notch in one of the bent portions, punchingy aV base from sheetmetal stock, Welding a portion of the rst mentioned blank to thebase,swagng the base and first mentioned blank where they are joined togetherby welding to a predetermined thickness, and shaving. the weldedtogether base and blank to the desired contour for use as the latchingportion of a lock bolt.

8. A method of forming bolts for vrotor center l tumbler type lockscomprising punching an apertured and slotted lblank from sheet ymetalstock, bending a projecting portion of the blank at right angles to theremainder thereof to form a strengthening rib, welding a flat sheetmetal plate i to a projecting portion of the blank, swaging the weldedtogether portions of the blank and the `plate to a predeterminedthickness, forming an upper portion of the bolt by punching anirregularly shaped blank from sheet metal stock, standing theirregularly shaped blank on edge, and

' shaving a bevel on one edge thereof and a V- shaped groove on theother edge thereof, punch-y ing a notch in the blankthus formed, bendingthe blank to a substantiallyU-shaped conguration,v inserting twoportions of the irregularly shaped blank which is now of U-shapedconguration in the apertures formed in the base, riveting the U-shapedmember to the base, and shaving the latching portion to they desiredcontour.

- ANDREW L. SCHUYLER.

